What causes a SPN 876 code?

SPN 876 can be triggered by several issues — see the verified probable causes and step-by-step diagnostics shared by mechanics and owners on OBDIY.

Can I drive with a SPN 876 code?

Drivability depends on the severity. Check the severity rating and verified driver reports on this page before continuing to drive with SPN 876 active.

How do I fix SPN 876?

Follow the step-by-step diagnostic on this page, then read the verified fixes contributed by other Heavy Truck owners — the answer marked "Verified Cause" worked for the original poster.

OBDIY

J1939 SPN

SPN 876

J1939 SPN 876 — Engine Management parameter

What it means

A/C Compressor Clutch Command. This code indicates an electrical fault (short to ground, short to battery, or open circuit) in the circuit used by the ECM to engage the air conditioning compressor clutch.